Easy Grader: grade any test in seconds
Enter the number of questions and how many were missed. Get the percentage, the letter grade, and a full grading chart for the whole class, all in one go.
What is an easy grader?
An easy grader is a tool that turns the number of wrong answers on a test into a percentage and a letter grade, instantly. Teachers used to do this with a small sliding paper card. They would line up the number of questions with the number wrong, then read off the score along the edge. This calculator does exactly the same job, just faster, more accurate, and without the physical card.
It is built for the moment you are sitting with a stack of graded tests. You need to convert raw scores into something you can record. That means a percentage for your gradebook and a letter grade for the report card. Doing the division and rounding by hand for every paper takes time. With this easy grader, you do the math once for the question count, then read the rest straight off the chart.
The tool works for any subject and any test length. Math quizzes, spelling tests, multiple choice exams, and short answer tests all use the same basic scoring idea. You take the number correct, divide by the number possible, and turn that into a percentage. An easy grader simply automates that step so you never have to do it by hand again.
Why teachers and students both use an easy grader
Teachers use an easy grader to speed up grading day. Instead of grabbing a calculator for every paper, they enter the total questions once and look up each student’s score on the chart. This cuts grading time significantly when a class has twenty or thirty students taking the same test.
Students and parents use the same tool for a different reason. After a test comes back, it helps to know exactly what percentage and letter grade a score represents. This is especially useful when a teacher only writes the number wrong on the paper instead of the percentage. An easy grader fills in that missing information in seconds.
How to use the easy grader
- Enter the total number of questions on the test using the field above. This sets up the scale for the whole chart.
- Enter how many answers were wrong for the student you are grading. Count blank or unanswered questions as wrong too.
- Pick a grading scale. Standard is the most common in US schools, where 90% and up is an A. Strict and Lenient scales are available if your school uses different cutoffs.
- Read the result. The percentage and letter grade appear immediately above and recalculate as you type.
- Open the grading chart if you are grading more than one paper with the same question count. It lists every possible score and letter grade for that test, so you only need to look up the number wrong for each student.
Worked example
Say a test has 25 questions and a student got 3 wrong. That means 22 correct out of 25, which works out to 88%. On the standard scale, that is a B+. Change the total to 25 and wrong answers to 3 in the calculator above to see this confirmed instantly. The chart below the result also shows every other possible score on the same 25 question test, so you can compare scores across the whole class at a glance.
This kind of quick lookup matters most when you have a tall stack of papers and limited time. Once the chart is built for a 25 question test, you simply scan each paper for the number wrong and read the score straight off the table. There is no repeated math, and no risk of a typo in a calculator app.
Why use an easy grader instead of doing it by hand
Grading one paper by hand is manageable. Grading thirty papers from the same test is where it gets slow, and where small arithmetic mistakes start to matter. A single subtraction error can shift a student into the wrong letter grade entirely. An easy grader removes that risk completely. The chart view means the calculation only happens once per test, not once per student.
- No formulas to remember or re-derive each grading session
- One chart works for an entire class taking the same test
- Choose from three common grading scales used in different schools
- Everything runs in your browser, and nothing you enter is saved or sent anywhere
- Works equally well on a laptop, tablet, or phone during grading
Tip: if your course grades by weighted categories such as homework, midterms, and finals rather than single tests, a weighted or section based grade calculator is the better tool for that. This easy grader is built specifically for question count grading on individual tests and quizzes.
Common grading scales explained
Not every school uses the same letter grade cutoffs. This easy grader includes three common scales so you can match it to your own grading policy.
| Percentage | Standard | Strict | Lenient |
|---|---|---|---|
| 90 to 100% | A | A minus to A | A |
| 80 to 89% | B | B to B plus | A minus to B plus |
| 70 to 79% | C | C to C plus | B to B minus |
| 60 to 69% | D | D to D plus | C to D |
| Below 60% | F | F | F, below 50% |
Grading scales vary by school, by district, and sometimes by individual teacher. If yours does not match any of the three built into this calculator, use the percentage result directly. You can then apply your own school’s cutoffs when assigning the final letter grade.
Tips for grading a full class quickly
Start by entering the total number of questions for the test, then open the grading chart right away. With the chart open, you do not need to touch the calculator again for that test. Simply read down the Wrong column on each paper, find the matching row, and write the score and letter grade. This approach is faster than typing numbers into a calculator for every single student.
If you are grading several different tests in one sitting, change the total questions field between tests and let the chart rebuild automatically. The easy grader updates everything instantly, so there is no need to reload the page or start over.
Frequently asked questions
18 out of 20 is 90%, which is an A minus on the standard scale. Enter 20 total questions and 2 wrong into the calculator above to confirm, along with every other score out of 20.
45 out of 50 is 90%, an A minus on the standard scale. Set total questions to 50 and wrong answers to 5 to confirm and see nearby scores on the chart.
It subtracts the wrong answers from the total questions to get the number correct. Then it divides that by the total and multiplies by 100. The result is matched to a letter grade using whichever scale you select.
Yes. Once you set the total number of questions, the grading chart shows every possible score for that test. You can look up each student’s score from the chart without recalculating for every paper.
Yes, it is completely free with no sign up required. All calculations happen in your browser, and nothing you enter is stored or shared.
Pick the closest built in scale, or simply use the percentage result and apply your school’s own letter grade cutoffs manually.
Yes. The easy grader works on phones, tablets, and computers, so you can grade papers wherever you are without needing a separate app.